EP0609610B1 - Raccord rotatif à grande vitesse - Google Patents

Raccord rotatif à grande vitesse Download PDF

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Publication number
EP0609610B1
EP0609610B1 EP93308585A EP93308585A EP0609610B1 EP 0609610 B1 EP0609610 B1 EP 0609610B1 EP 93308585 A EP93308585 A EP 93308585A EP 93308585 A EP93308585 A EP 93308585A EP 0609610 B1 EP0609610 B1 EP 0609610B1
Authority
EP
European Patent Office
Prior art keywords
nipple
journal
bore
axis
rotary joint
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93308585A
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German (de)
English (en)
Other versions
EP0609610A1 (fr
Inventor
James A. Medsker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Johnson Corp
Original Assignee
Johnson Corp
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Filing date
Publication date
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Publication of EP0609610A1 publication Critical patent/EP0609610A1/fr
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Publication of EP0609610B1 publication Critical patent/EP0609610B1/fr
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Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
    • F16L27/0804—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another
    • F16L27/0808—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation
    • F16L27/0824—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with ball or roller bearings
    • F16L27/0828—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with ball or roller bearings having radial bearings

Definitions

  • the invention pertains to rotary joints for supplying heat transfer medium to rotating drums or rolls and is particularly suitable for use with rapidly rotating drums or rolls requiring a high degree of mounting accuracy of the rotary joint on the drum journal.
  • Rotating drums and journals containing hot or cold heat transfer mediums such as water or steam are commonly used in the manufacture of paper, fabric and the like.
  • the article being treated passes over the drum or roll periphery during heat transfer, and paper producing mills, for instance, use many such rotating drums to control the paper moisture content and other product characteristics.
  • the assignee has developed a variety of rotary joints adapted to be mounted upon a journal of a rotating drum or roll to permit steam or water to be introduced into the drum, or removed therefrom, and reference is made to U.S. Patent Nos.
  • DE-A-3 600 884 discloses a rotary joint having a main housing and a rotatable element supported therein in bearings.
  • the rotatable element extends at one end from the housing and is provided at its extreme end with a thread. This thread is intended to engage an internal thread of a pipe. Concentric location of the pipe relative to the axis of rotation of the rotatable element is dependent upon accurate machining of the two cooperating threads.
  • US-A-3 889 983 discloses a generally similar joint to that disclosed in DE-A-3 600 884.
  • a high speed rotary joint attached to the end of a metal rotating journal having an axis of rotation and an end comprising, in combination, a threaded bore defined in the journal concentric to the journal axis and intersecting the journal end, a first circular recess reference surface defined on the journal intersecting the journal end and concentric to the journal axis, and a second reference surface defined on the journal end radially and axially inward of said first surface and transversely related to and concentric to the journal axis, the rotary joint comprising:
  • the embodiments additionally provide a high speed rotary joint for rapidly rotating heat exchanger journals wherein a threaded interconnection exists between the journal and the joint nipple and piloting cylindrical reference surfaces and flat reference surfaces formed on the journal and nipple engage in metal-to-metal relationship to accurately relate the journal and nipple regardless of thread tolerances.
  • the embodiments also provide a rotary joint for rotating journals utilizing a seal ring and counterseat in a sealing relationship between rotating and stationary joint components wherein widely spaced bearings can be accommodated within a rotary joint of minimal axial dimension.
  • the rotary joint is used with a high speed roller or drum which includes a journal extending through the drum support bearings, and the journal is tubular communicating with the drum interior.
  • the end of the journal is machined with a flat surface perpendicular to the journal axis, and the journal bore is threaded adjacent the journal end.
  • a cylindrical pilot surface intersecting the journal end is formed in the journal concentric to its axis, and an inner radial shoulder surface intersecting the cylindrical surface is also defined in the journal intersecting the bore.
  • the shoulder is perpendicular to the journal axis.
  • Syphon pipe structure may be located within the journal bore if the rotary joint employs syphon piping.
  • the rotary joint comprises a housing having at least one port defined therein which communicates with a housing chamber.
  • the housing includes bearings rotatably supporting a tubular nipple having an outer end extending from the housing for attachment to the journal end.
  • the outermost portion of the nipple outer end is threaded for mating with the journal bore threads, and the nipple outer end includes a cylindrical piloting reference surface concentric to the nipple axis for tight reception within the journal end cylindrical reference surface.
  • the nipple outer end includes a flat reference shoulder perpendicular to the nipple axis for engaging the journal shoulder.
  • journal and nipple cylindrical reference surfaces and shoulder reference surfaces engage in a metal-to-metal relationship, and upon threading the nipple outer end into the journal ends the nipple axis will be maintained in an accurate coaxial relationship to the journal axis.
  • the nipple inner end includes sealing structure for sealing the rotating nipple with respect to the stationary joint housing under the relative rotating relationship which exists, and this sealing structure communicates with a housing chamber ported to communicate with a fluid medium supply source or discharge conduit system.
  • the rotary joint housing may include a fitting and port for accommodating syphon pipe structure communicating with a journal syphon pipe.
  • the nipple is formed with a bore of a large enough diameter to internally accommodate an elongated seal ring and spring assembly.
  • the counterseat associated with the seal ring is mounted upon the rotary joint housing, and by incorporating the seal ring and compression spring within the nipple the spacing between the bearings can be increased for improved stability, and in fact, the housing length may be reduced when using this embodiment.
  • journal of a heat exchanger drum or roll is generally indicated at 10.
  • the journal 10 will normally be mounted in bearings, not shown, and each end of the heat exchanger drum or roll, not shown, will include a journal 10 for rotatably supporting the heat exchanger.
  • the journal 10 includes a coaxial bore 12 intersecting the journal end 14 which comprises a flat surface perpendicularly disposed to the journal axis.
  • the bore 12 is provided with internal threads 16, and the journal may be chamfered at 18 adjacent the threads.
  • a radial reference shoulder 20 is defined on the journal which lies in a plane perpendicular to the journal axis, and the shoulder 20 intersects the cylindrical piloting reference surface 22 intersecting the bore end 14.
  • the surface 22 is accurately concentrically machined relative to the journal axis of rotation.
  • the rotary joint in accord with the invention is generally indicated at 24, and includes a metal housing 26 of an elongated configuration.
  • the housing 26 includes an internal recess 28 which intersects the housing open end 30, and the housing also includes an inner chamber 32 concentric to the housing axis.
  • a port 34 defined in a side of the housing 26 is in communication with the chamber 32, and may be threaded or other connection means, not shown, associated therewith for attaching a conduit, not shown, to the port 34.
  • a threaded port 36 may be defined in the housing 26 coaxial with the housing axis for receiving a syphon fitting, as later described. Vents 38 formed in the housing communicate with the recess 28 to permit coolant escaping from the joint seals to be vented to the atmosphere.
  • the tubular nipple 40 partially located within the recess 28 includes an outer end 42 extending from the housing, and an inner end 44.
  • the nipple includes a bore 45, and the nipple is rotatably supported within the housing recess 28 by a pair of ball bearings 46 separated by an annular spacer 48.
  • a snap ring 50 received within a housing groove maintains the bearings within the recess 28, and a radial shoulder 52 defined upon the nipple associating with the outermost bearing in conjunction with the snap ring 54 received within a nipple groove axially relates the bearings 46 and the nipple 40 to prevent relative axial displacement between the nipple and housing 26.
  • the inner end of the nipple 40 is provided with an annular counterseat 56 which is anchored against rotation by an anchor pin, and the outer face of the counterseat 56 constitutes a sealing surface for cooperation with the seal ring as later described.
  • the aforementioned relationship between the counterseat 56 and the seal ring is similar to that described in the assignee's U.S. Patent 4,606,561.
  • An annular seal ring 58 is mounted within the chamber 32 coaxial to the housing axis, and the seal ring is formed of a hard seal material and is anchored against rotation relative to the housing 26 by anchor pins.
  • An O-ring engages the inner end of the seal ring 58, and the O-ring is compressed by an annular brass follower 62 which is biased into engagement with the O-ring by the compression spring 64 located within chamber 32.
  • the spring 32 thereby imposes an axial biasing force on the seal ring 58, which is capable of limited axial displacement relative to the chamber 32, to accommodate counterseat and seal ring wear.
  • the nipple outer end 42 is provided with threads 66 which cooperate with the journal threads 16, and the nipple is countersunk at 68 adjacent the nipple radial reference shoulder 70 which is flat and perpendicular to the nipple axis.
  • the nipple outer end also includes a cylindrical reference surface 72 accurately machined to be concentric to the nipple axis and of a diameter substantially the same as the journal surface 22, however, the diameter of the surface 72 may be slightly smaller than the diameter of surface 22, but the dimensions are such that a snug metal-to-metal contact between the surfaces exists when the nipple is assembled to the journal.
  • the nipple outer end also includes a flat radial shoulder 74 which is perpendicular to the nipple axis, and is axially spaced from the journal end 14.
  • a resilient O-ring 76 is located on the nipple between the threads 66 and shoulder 70, and this O-ring establishes a fluid tight connection between the journal and nipple.
  • a syphon tube 78 may be located within the journal bore 12, and the syphon tube 78 will communicate with a syphon within the heat exchanger drum or roll, not shown.
  • the syphon tube may include a bearing 80 for rotatably receiving the rotary joint internal pipe 82 which communicates with the elbow fitting 84 threaded into the housing port 36, and in this manner the tube 78, pipe 82 and elbow 84 constitute a condensate removal system optionally usable with the disclosed rotary joint.
  • the port 36 may not be formed in the housing, or may be plugged.
  • the nipple threads 66 are fully threaded into the journal bore threads 16, and the axial displacement of the nipple 40 toward the journal 10 causes the surface 72 to be tightly received within the bore surface 22.
  • the nipple will continue to be rotated relative to the journal until the shoulder 70 engages the bore shoulder 20.
  • This multiple metal-to-metal engagement between the nipple 40 and the journal 10 very accurately coaxially relates the axes of the nipple and journal regardless of inaccuracies in the threads 16 or 66, and use of the O-ring 76, in addition to the metal-to-metal surface engagements, produces a fluid tight relationship between the nipple and the journal and permits the rotary joint 24 to be used with high speed journals in view of the very accurate mounting of the nipple upon the journal.
  • FIGS. 2 - 4 a variation in the joint construction is illustrated, and in this embodiment the mounting of the nipple upon the journal is identical to that previously described above, and with respect to FIGS. 2 - 4 components similar to those previously described are indicated by primed reference numerals.
  • the outer races of the bearings 46' are prevented from rotating by the use of O-rings 47 received within annular grooves formed in housing 26'.
  • the O-rings 47 eliminate the necessity to heat the housing 26' during assembly to achieve an interference fit with the bearing races, as is the usual mode of assembly, and assembly of the rotary joint can be made without special tools or heating.
  • the nipple 86 is of the configuration best illustrated in FIG. 3.
  • the nipple 86 includes a large concentric cylindrical bore 88 intersecting a smaller diameter bore 90 which intersects the nipple outer end. The intersection of the bores 88 and 90 is at the radial shoulder 92.
  • the nipple includes the inner end 94 and an enlarged cylindrical recess 96 is defined in the inner end 94 by diametricially opposed axial ears intersecting the end of the nipple and the recess includes a radial shoulder 98 with respect to the bore 88.
  • the nipple threads 100 mate with the syphon bore threads 16', and the nipple is recessed at 110 in order to receive an O-ring similar to that shown at 76 described above.
  • the nipple also includes a radial shoulder 112 lying in a plane perpendicular to the nipple axis and the cylindrical surface 114 is concentric to the nipple axis.
  • the second radial shoulder perpendicular to the nipple axis is represented at 116, and the shoulders 112 and 20', and the cylindrical surfaces 114 and 22' cooperate with each other, respectively, in the manner described above to very accurately coaxially mount the nipple 86 with respect to the journal 10'.
  • the annular seal ring 118 is of the configuration best appreciated from FIG. 4 and includes an enlarged shoulder diameter 120 slidably received within the nipple recess 96.
  • the seal ring 118 also includes a smaller diameter 122 slidably received within the nipple bore 88.
  • the seal ring 118 includes the end seal surface 124, and a resilient O-ring 126 bears against the opposite end of the seal ring and is engaged by the annular brass follower 128 which is biased against the O-ring by the compression spring 130 which also bears against the nipple shoulder 92. In this manner, the seal ring 118 rotates with the nipple and is baised to the left as illustrated in the drawings.
  • the annular counterseat 132 is mounted within the rotary joint housing 26' in a coaxial relationship to the seal ring 118, and includes a flat seal surface 134 engaging the seal ring surface 124 in a sealed relationship.
  • the counterseat 132 is provided with a flat 136 in its periphery which cooperates with a flat in housing 26' which prevents rotation of the counterseat 132, and the resilient O-ring 138 seals the counterseat with respect to the housing 26'. It will be appreciated that in the aforedescribed embodiment the seal ring 118 is substantially fully received within the axial dimension of the nipple 86, and this construction permits the bearings 46 to be axially spaced apart a greater distance although such greater spacing is not apparent in FIG.
  • the location of the seal ring 118 and its associated components, including the spring 130, permits these components to be axially accommodated within the axial dimension of the nipple 86, and with this construction permitting a greater spacing between bearings 46, improved stability of the joint is achieved, a better balance of the bearing loads occurs and an increased bearing life is experienced.
  • Internal displacement of the seal ring 118 into the nipple is limited by engagement of the diameter 120 with the shoulder 98, and the embodiment of FIGS. 2 - 4 may be readily assembled without requiring unusual skills.
  • a rotary joint capable of a long effective life in a high speed heat exchanger environment.
  • the use of the metal-to-metal engagement of the journal and nipple radial and cylindrical reference surfaces assures a coaxial relationship between the axes of the journal and nipple, and a rotary joint constructed in accord with the inventive concepts is capable of high speed operation without imposing undue stress upon the rotary joint components and the conduits associated therewith.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints Allowing Movement (AREA)

Claims (9)

  1. Raccord rotatif à haute vitesse attaché à l'extrémité d'un pivot rotatif en métal (10) ayant un axe de rotation et une extrémité (14) comprenant, en combinaison, un perçage taraudé (12, 16) défini dans le pivot concentriquement à l'axe du pivot et recoupant l'extrémité du pivot, une première surface de référence évidée circulaire (22) définie sur le pivot et recoupant l'extrémité du pivot et concentrique à l'axe du pivot, et une seconde surface de référence (20) définie sur l'extrémité du pivot radialement et axialement à l'intérieur de ladite première surface et en relation transversale et concentrique à l'axe du pivot, le raccord rotatif (24) comprenant :
    - un boîtier (26) ;
    - au moins un orifice (34) défini dans ledit boîtier ;
    - un manchon métallique tubulaire (40) ayant un axe et monté en rotation à l'intérieur dudit boîtier en communication avec ledit orifice et ayant une extrémité extérieure (42) qui s'étend vers l'extérieur depuis ledit boîtier ;
    - des filets (66) défini sur ladite extrémité extérieure du manchon et appariés avec ledit perçage taraudé du pivot (12, 16) ;
    - une troisième surface de référence circulaire (72) définie sur ladite extrémité extérieure du manchon et concentrique à l'axe dudit manchon, complémentaire dans sa configuration et en contact avec ladite première surface de référence ; et
    - une quatrième surface de référence (70) définie sur ladite extrémité extérieure du manchon radialement vers l'intérieur et axialement vers l'extérieur de ladite troisième surface, en relation transversale et concentrique audit axe du manchon, et de configuration complémentaire et en contact avec ladite seconde surface de référence ; et
    - ladite première et ladite troisième surface de référence, et ladite seconde et ladite quatrième surface de référence, respectivement, étant en engagement métal-sur-métal sur ladite extrémité extérieure du manchon, étant entièrement vissée dans ledit perçage taraudé du pivot pour assurer un co-alignement précis des axes du pivot et dudit manchon.
  2. Raccord rotatif à haute vitesse selon la revendication 1, dans lequel ladite première et ladite troisième surface de référence (22, 72) sont cylindriques.
  3. Raccord rotatif à haute vitesse selon l'une ou l'autre des revendications 1 et 2, dans lequel ladite seconde et ladite quatrième surface de référence (20, 70) sont sensiblement planes et perpendiculaires à l'axe du pivot et à l'axe du manchon, respectivement.
  4. Raccord rotatif à haute vitesse selon l'une ou l'autre des revendications 2 et 3, comprenant en outre un évidement annulaire en contre-dépouille (68) défini sur lesdites extrémités extérieures du manchon en position intermédiaire entre lesdits filets du manchon et ladite quatrième surface de référence, et une bague d'étanchéité élastique annulaire (76) à l'intérieur dudit évidement.
  5. Raccord rotatif à haute vitesse selon l'une quelconque des revendications 1 à 4, attaché à un pivot tubulaire d'un tambour échangeur de chaleur, comprenant en outre :
    - une paire de paliers axialement écartés (46) à l'intérieur du boîtier qui supporte en rotation le manchon tubulaire (86) ;
    - un perçage cylindrique (90) défini de façon concentrique dans le manchon et recoupant l'extrémité intérieure de celui-ci ;
    - une bague d'étanchéité tubulaire (118) axialement déplaçable à l'intérieur dudit perçage et en relation étanche avec celui-ci, ladite bague d'étanchéité ayant une face d'étanchéité terminale extérieure plane (124) qui s'étend depuis l'extrémité extérieure du manchon perpendiculairement à l'axe du manchon, et une extrémité intérieure à l'intérieur dudit perçage de manchon ;
    - un ressort (130) à l'intérieur dudit perçage du manchon et repoussant ladite bague d'étanchéité dans la direction axiale de l'extrémité intérieure du manchon ;
    - un contre-siège annulaire (132) monté de façon fixe sur le boîtier et concentrique à l'axe du manchon, en communication avec la chambre du boîtier, ayant une face plane perpendiculaire à l'axe du manchon et en engagement étanche concentrique et en rotation avec ladite face annulaire d'étanchéité ;
    - ledit ressort maintenant ladite face annulaire d'étanchéité en engagement étanche avec ladite face du contre-siège pendant la rotation du manchon.
  6. Raccord rotatif à haute vitesse selon la revendication 5, comprenant en outre un diamètre agrandi (96) défini dans ledit perçage du manchon et recoupant l'extrémité intérieure du manchon en définissant un épaulement radial (98) axialement écarté de l'extrémité intérieure du manchon, ladite bague d'étanchéité comprenant un diamètre agrandi (120) reçu à l'intérieur dudit diamètre agrandi du perçage définissant un épaulement susceptible d'être engagé avec ledit épaulement du perçage afin de limiter l'introduction axiale de ladite bague d'étanchéité dans ledit perçage du manchon.
  7. Raccord rotatif à haute vitesse selon l'une ou l'autre des revendications 5 et 6, comprenant en outre :
    - un joint torique élastique annulaire (126) à l'intérieur dudit perçage du manchon en engagement avec ladite extrémité intérieure de la bague d'étanchéité, une bague suiveuse annulaire (128) axialement mobile à l'intérieur dudit perçage du manchon en engagement avec ledit joint torique pour forcer ledit joint torique contre ladite extrémité intérieure de la bague d'étanchéité afin d'étancher ladite bague d'étanchéité (128) par rapport audit perçage du manchon, ledit ressort (130) engageant ladite bague suiveuse.
  8. Raccord rotatif à haute vitesse selon la revendication 7, comprenant en outre un épaulement radial concentrique annulaire (92) défini dans ledit perçage de manchon et axialement espacé de l'extrémité intérieure du manchon, en faisant face à ladite extrémité intérieure, ledit ressort (130) comprenant un ressort de compression comprimé entre ledit épaulement du perçage et ladite bague suiveuse.
  9. Raccord rotatif à haute vitesse selon l'une des revendications 5, 6, 7 ou 8, dans lequel les paliers (46) comportent chacun une bague extérieure, et comprenant en outre :
    - un joint torique élastique annulaire (47) monté dans le boîtier en alignement radial et en engagement ferme avec chaque bague extérieure de palier, lesdits joints toriques empêchant la rotation desdites bagues extérieures par rapport au boîtier.
EP93308585A 1993-02-01 1993-10-28 Raccord rotatif à grande vitesse Expired - Lifetime EP0609610B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11903 1993-02-01
US08/011,903 US5303959A (en) 1993-02-01 1993-02-01 High speed rotary joint

Publications (2)

Publication Number Publication Date
EP0609610A1 EP0609610A1 (fr) 1994-08-10
EP0609610B1 true EP0609610B1 (fr) 1997-05-07

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EP93308585A Expired - Lifetime EP0609610B1 (fr) 1993-02-01 1993-10-28 Raccord rotatif à grande vitesse

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US (1) US5303959A (fr)
EP (1) EP0609610B1 (fr)
JP (1) JP2581894B2 (fr)
DE (1) DE69310494T2 (fr)

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JP5522528B2 (ja) * 2009-09-15 2014-06-18 株式会社リコー 冷却装置及び画像形成装置
JP6199741B2 (ja) * 2010-12-09 2017-09-20 タイコ、ファイアー、アンド、セキュリティー、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツングＴｙｃｏ Ｆｉｒｅ ＆ Ｓｅｃｕｒｉｔｙ ＧｍｂＨ 工業用消火のための消火栓マニホールドを備えるスイベル、または工業用消火のための消火栓マニホールド用のスイベル
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DE3600884A1 (de) * 1986-01-15 1987-07-16 Glyco Antriebstechnik Gmbh Hochleistungs-drehdurchfuehrung
US4817995A (en) * 1987-02-06 1989-04-04 Deublin Company Rotating union with replaceable sealing assembly
US4758026A (en) * 1987-02-17 1988-07-19 The Johnson Corporation Rotary joint with balanced seals
US5165734A (en) * 1991-09-03 1992-11-24 Smith Precision Products Company Conduit swivel connector

Also Published As

Publication number Publication date
EP0609610A1 (fr) 1994-08-10
US5303959A (en) 1994-04-19
DE69310494T2 (de) 1997-08-21
JP2581894B2 (ja) 1997-02-12
JPH06235486A (ja) 1994-08-23
DE69310494D1 (de) 1997-06-12

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